obama had their apartment up front. we're told they spent an awful lot of time on that flight together in the conference room, joining together to remember a man who changed so much. and we see again that crowd in the stadium. let's go to abc's terry moran there right now. lots of singing going on for several hours, terry. >> george, this has been an amazing morning so far. in a cold and soaking rain that as you can see is keeping down the crowd's numbers. but still streaming in. it has done nothing to keep down the spirits of the people here. it is impossible to describe, really, the feeling here. it's full of joy and pride. and what can only be described as a natural solidarity among all of us here. here to pay tribute to the life of nelson mandela. as you described, world leaders, they're shown on the screen from time to time. people roaring their approval as they see one after another enter the stadium. and this is a stadium that has just been filled with song. with music. the south african liberation movement was a